#===============================================================================
# Copyright 2011 Jake Ross
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#===============================================================================

#=============enthought library imports=======================

#=============standard library imports ========================

#=============local library imports  ==========================

class Panner:
    '''
    '''

    def click(self, pt):
        '''
        '''
        self.start_pt = pt
    def drag(self, pt):
        '''
        '''
        scale = 16.5
        try:
            t = [(self.start_pt[0] - pt[0]) / scale, (self.start_pt[1] - pt[1]) / scale, 0]
            self.click(pt)
            return t
        except:
            pass
